PO Approval Workflow based on position hierarchy

Summary:

Can I define a PO Approval workflow based on position hierarchy even if exists a different position hierarchy on the requisition approval?

Is there a constraint for which I should create only one position hierarchy?

I would like to know if I can define two approval workflow based on position hierarchy

Content (please ensure you mask any confidential information):

Purchasing

Version (include the version you are using, if applicable):

23D

Code Snippet (add any code snippets that support your topic, if applicable):